content: /* ===========================================================
   * JFreeChart : a free chart library for the Java(tm) platform
   * ===========================================================
   *
   * (C) Copyright 2000-2011, by Object Refinery Limited and Contributors.
   *
   * Project Info:  http://www.jfree.org/jfreechart/index.html
   *
   * This library is free software; you can redistribute it and/or modify it
   * under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation; either version 2.1 of the License, or
   * (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
   * USA.
   *
   * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
   * Other names may be trademarks of their respective owners.]
   *
   * --------------------
   * CategoryDataset.java
   * --------------------
   * (C) Copyright 2000-2008, by Object Refinery Limited.
   *
   * Original Author:  David Gilbert (for Object Refinery Limited);
   * Contributor(s):   -;
   *
   * Changes (from 21-Aug-2001)
   * --------------------------
   * 21-Aug-2001 : Added standard header. Fixed DOS encoding problem (DG);
   * 18-Sep-2001 : Updated e-mail address in header (DG);
   * 15-Oct-2001 : Moved to new package (com.jrefinery.data.*) (DG);
   * 22-Oct-2001 : Renamed DataSource.java --> Dataset.java etc. (DG);
   * 17-Nov-2001 : Updated Javadoc comments (DG);
   * 04-Mar-2002 : Updated import statement (DG);
   * 23-Oct-2002 : Reorganised code (DG);
   * 10-Jan-2003 : Updated Javadocs (DG);
   * 21-Jan-2003 : Merged with TableDataset (which only existed in CVS) (DG);
   * 13-Mar-2003 : Added KeyedValues2DDataset interface (DG);
   * 23-Apr-2003 : Switched CategoryDataset and KeyedValues2DDataset so that
   *               CategoryDataset is the super interface (DG);
   * 18-Aug-2004 : Moved from org.jfree.data --> org.jfree.data.category (DG);
   *
   */
  
  package org.jfree.data.category;
  
  import org.jfree.data.KeyedValues2D;
  import org.jfree.data.general.Dataset;
  
  /**
   * The interface for a dataset with one or more series, and values associated
   * with categories.
   * <P>
   * The categories are represented by <code>Comparable</code> instance, with the
   * category label being provided by the <code>toString</code> method.
   */
  public interface CategoryDataset extends KeyedValues2D, Dataset {
  
      // no additional methods required
  
  }
  